From e4abb59d3a2dd2fd90435644ae6b39d2dc204d6d Mon Sep 17 00:00:00 2001
From: David Rosca <nowrep@gmail.com>
Date: Sun, 24 Jan 2016 15:47:28 +0100
Subject: [PATCH] QzTools: Return empty url when pixmap is null in
 pixmapToDataUrl

---
 src/lib/tools/qztools.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/lib/tools/qztools.cpp b/src/lib/tools/qztools.cpp
index 7dc9c2c9d..bc3940b86 100644
--- a/src/lib/tools/qztools.cpp
+++ b/src/lib/tools/qztools.cpp
@@ -77,7 +77,8 @@ QPixmap QzTools::pixmapFromByteArray(const QByteArray &data)
 
 QUrl QzTools::pixmapToDataUrl(const QPixmap &pix)
 {
-    return QUrl(QSL("data:image/png;base64,") + QString(pixmapToByteArray(pix)));
+    const QString data(pixmapToByteArray(pix));
+    return data.isEmpty() ? QUrl() : QUrl(QSL("data:image/png;base64,") + data);
 }
 
 QString QzTools::readAllFileContents(const QString &filename)